To solve the problem of expansion joint leakage is to solve the problem of water accumulation in the groove. The only feasible way is to use the self-sealing and leveling process to fill the groove and seal the expansion joint as a whole, so that the acid water can not contact the expansion joint pressing plate bolts and skin, so there will be no leakage. This is also the simplest way, so that the acid water will not accumulate in the groove, and will not cause corrosion leakage of the expansion joint. Fill the groove so that other parts of the expansion joint will no longer cause fatigue damage to the skin due to frequent buckling of the expansion joint skin caused by the change of flue gas pressure.

HRT9030 produced by Hengruite is an acid resistant, heat resistant and flame retardant tung oil gel, which is mainly composed of tung oil triglyceride and silica gel. With a two-component distribution ratio, it can be cured at room temperature, and has excellent acid resistance. At the same time, it has the characteristics of strong adhesion, fast drying, soft film, water resistance, light resistance, alkali resistance, etc. It is exposed to the outside for a long time (above 25 ℃), without cracking, degradation, viscosity and other aging phenomena. How to construct the self-sealing material of flue expansion joint? Let's take you to know:

1. After shutdown, clean the dust around the expansion joint and remove the damaged skin at the bottom (if the skin damage is not serious, it is not necessary to remove it).

2. After the metal skeleton of non-metallic expansion joint is completely cleaned of the floating ash, the corroded part shall be welded and repaired.

3. After the welding repair is completed, it needs to be polished and leveled, and the glass flake corrosion prevention shall be done after the primer is applied.

4. Install the fluororubber expansion joint skin, and the joints on both sides are firmly bonded with high-temperature rubber adhesive.

5. After installing the expansion joint skin, quickly coat both sides of the expansion joint groove with high elastic adhesive, and fill the high temperature and corrosion resistance and high elastic sponge polyurethane filler into the groove before curing.

6. Each layer of filler shall be sealed once until the gap of the pressing plate of the non-metallic expansion joint is filled. The top layer shall be carefully leveled with high elastic acid-resistant adhesive, and the thickness shall be controlled at about 3mm.

7. The joints around the expansion joint shall be coated with high elastic acid resistant adhesive with high elastic corrosion resistant adhesive, and the thickness shall be more than 3mm. It can be put into use after maintenance for 6 hours.